Any bright types out here seen something like this before? Is there anything actionable I should take aware from this:

 [2013-05-03 22:03:47] New block: 0124e5430a473503... diff 10.1M
 [2013-05-03 22:03:47] JSON-RPC decode failed: [
   20,
   "_stratum_mining_subscribe() takes exactly 1 positional argument (3 given)",
   "Traceback (most recent call last):\n  File \"/home/bitcoinpool/eloipool/stratumserver.py\", line 91, in found_terminator\n    rv = getattr(self, funcname)(*rpc['params'])\nTypeError: _stratum_mining_subscribe() takes exactly 1 positional argument (3 given)\n"
]
 [2013-05-03 22:03:48] Stratum authorisation success for pool 2